#include <stdio.h>
#include <math.h>
//#include "myadd.h"
//#include "mysub.h"

int main()
{
    double d = pow(2.0,3.0);
    printf("%lf\n", d);
    //int x = 10;
    //int y = 20;
    //printf("add: %d\n", myadd(x, y));
    //printf("sub: %d\n", mysub(x, y));
    //printf("hello world!\n");
    return 0;
}
